The first link shows correctly, as it should. Maybe you should clear caches to see it correctly, if possible.

The second link shows the "Not available" weather state. Actually its current state is the correct one, but i agree in this case it should not display any image or display a "Not available image", which Yahoo! doesn't provide. I'll file a bug request to the developers and it should be fixed in the next release.

Anyway, i hope the "Not available" weather state changes soon, so an image should come up.